package org.leo.study.common.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * <p>
 * springboot 上下问题配置
 * </p>
 *
 * @Package: org.leo.study.configuration
 * @ClassName: SpringContext
 * @author: Li.Junlin
 * @date: 2019.10.12 23:07
 */
@Slf4j
@Component
public class SpringContext implements ApplicationContextAware {
    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        log.info("SpringBoot context loading...");
        if (SpringContext.applicationContext == null) {
            SpringContext.applicationContext = applicationContext;
        }
        log.info("SpringBoot context loading successd...");
    }

    //获取applicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    //通过name获取 Bean.
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }

    //通过class获取Bean.
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

    //通过name,以及Clazz返回指定的Bean
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
}
